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LIQUID INK COMPOSITION

IP.com Disclosure Number: IPCOM000025195D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 56K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a liquid ink composition for radiography or xerography, which ink is comprised of a dispersion of pigment particles, polymer, and charge control compositions, in a suitable aliphatic hydrocarbon solvent. In one embodiment, the liquid ink composition contains a polymer, or mixture of polymers, soluble in aliphatic hydrocarbon solvents, which polymers include poly(2-ethylhexlmetha-crylate), Pliolite OMS commercially available from Goodyear, alkanol DOA com-mercially available from E. I. duPont, polyisobutylene, commerically available from Exxon as Vistanex, and EX519 and available from Polyvinyl Chemicals, pigment particles such as carbon black coated with a blue dye, commerically available from P. Uhlich and Co., and as charge control additives in an amount of from about 0.1 percent by weight to about 10 percent by weight, of metal soaps or metal carboxylates, including metal stearates, octoates or naphthenates. The ratio of polymer to pigment particles varies from about 2:1 to 1:2.

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XEROX DISCLOSURE JOURNAL

LIQUID INK COMPOSITION
M. Croucher
J. Duff
S. Droppel
R. Wong

Proposed Classification US. Cl. 430/112
Int. C1. G03g 9/00

Disclosed is a liquid ink composition for radiography or xerography, which ink is comprised of a dispersion of pigment particles, polymer, and charge control compositions, in a suitable aliphatic hydrocarbon solvent. In one embodiment, the liquid ink composition contains a polymer, or mixture of polymers, soluble in aliphatic hydrocarbon solvents, which polymers include poly(2-ethylhexlmetha- crylate), Pliolite OMS commercially available from Goodyear, alkanol DOA com- mercially available from E. I. duPont, polyisobutylene, commerically available from Exxon as Vistanex, and EX519 and available from Polyvinyl Chemicals, pigment particles such as carbon black coated with a blue dye, commerically available from P. Uhlich and Co., and as charge control additives in an amount of from about 0.1 percent by weight to about 10 percent by weight, of metal soaps or metal carboxylates, including metal stearates, octoates or naphthenates. The ratio of polymer to pigment particles varies from about 2:1 to 1:2.

The useful liquid ink is formulated by dispersing the above particles in an amount of from about 0.1 percent by weight to about 5 percent by weight in a hydrocarbon solvent, such as Isopar G.

Volume 8 Number 6 November/December 1983 5 37

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